Rename softWrap to softWrapped

Our new pattern for booleans is to have ::set and ::is, and that means
the property name needs to be in passive voice for ::is to make sense.
This is in preparation for adding a new change observation method.

* ::setSoftWrapped
* ::isSoftWrapped
* ::toggleSoftWrapped

dot-atom/init.coffee

@@ -11,4 +11,4 @@
 # atom.workspaceView.eachEditorView (editorView) ->
 #   editor = editorView.getEditor()
 #   if path.extname(editor.getPath()) is '.md'
-#     editor.setSoftWrap(true)
+#     editor.setSoftWrapped(true)